Improvement in pipe-cutters



. F. l. MAULE.

Pipe-Cutter.

No. 161,773, Patented Sept.14,1875.

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UNITED STATES PATENT OFFICE.

FRANCIS I. MAULE, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN PIPE-CUTTERS.

Specification forming part of Letters Patent No. 167,773, dated September 14, 1875 application led l April 17, 1875.

ceed to describe, reference being had to thev accompanying drawing, in which- Figure l 1s a vertical section of my improved pipe-cutting instrument; Fig.2, a frontV View of the same Fig. 3, a sectional plan on the line l 2, Fig. l, drawn toa-n enlarged scale 5 and Fig. 4, a detached view of part of the instrument, also drawn to an enlarged scale.

lllhe body A of the instrument is threaded internally for the reception of the threaded end of the stem B, on the outer end of which is a suitable handle, I. This body A, on which is formed the fixed jaw x, has, at the rear, a chamber for the reception and guidance of the stem D ofthe movable jaw F, the chamber being adapted at its upper end to the squared portion of the said stem, so as to prevent the jaw from turning laterally. The jaw may be moved to and fro by operating the nut a, adapted to the threaded portion of the stem, and contained in a recess in the body A.

The cutter H is guided by a slot, h, in the body ofthe instrument, and may be advanced and retracted by the action of the screw-stem B, to which the cutter is connected, as shown in Fig. 4. This tool consisting of a dat strip of steel, on the upperedge of which is formed the cuttingedge, the lower end of the strip having an enlargement, d, over which fits the ferrule b, adapted and connected to the end of the stem B, in the manner shown in Fig. 4, so that the ferrule can turn freely on the cutter while the latter is being advanced or retracted by manipulating the screw-stem B.

An opening, z', is formed in the front edge of the body A during the manufacture of the same, in order to facilitate the formation of the slot h for guiding the cutter.

The edges of both the xed and movable jaws are made V-shaped, in order to effectually embracethe pipe to .be operated upon, and to insure the effective action of the cut` ter H.

The operation of the instrument is as follows: The cutter H is lirst retracted, in order to prevent the injuring of its cutting-edge while the instrument is being adjusted to the pipe to be severed.

A sufficient hold of the pipe having been effected, the instrument is turnedaround the said pipe while the latter is held in a vise or otherwise, the cutter H being gradually fed forward until the pipe is completely severed.

I wish it tobe understood that I lay no claim to the combination of a `jaw, A, with a cutter connected to, v and made adjustable through, the medium of a screw-stem, B, as pipe-cutting instruments containing such a combination have been heretofore made'.`

The main aim of my invention has been to obtain a jaw, A, of a substantial and solid v character, and free from the opening covered by a detachable plate, and hitherto deemed necessary for the admission of the cutter, and a slide attached to the same. This desirable end I have attained by the combination of parts which permit the ready application of the cutter and screw-stem to a solid jaw.

I claim as my invention- A pipe-cutting instrument, in which are combined, a screw-stem, B, a cutter, H, having an enlargement, d, and a ianged ferrule, b, by which the said enlargement is connected to the stem, the whole being adapted to the body A of the instrument, asset forth.

In testimony whereof I have signed my name to this specification in presence of two subscribing witnesses.

Y FRANCIS I. MAULE. Witnesses:

HUBERT HowsoN, HARRY SMITH. 

